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During an ACL reconstruction surgery, the surgeon replaces the torn ACL with a new one. The new ACL can come from a variety of different places, for a more in depth caption of where your ACL graft comes from, check out this blog. So you are likely wondering will my new ACL exist weaker, stronger, or the same as my original ACL? In this blog, nosotros volition discuss the force and healing process of your ACL graft, which is another word for the replacement or new ACL.

After an ACL injury, the graft goes through 3 main stages of healing: the early graft stage, proliferation phase, and ligamentization stage.

Early Graft Healing Phase (0 - 4 Weeks After Surgery)

  • The objective tensile force of most grafts is much stronger than that of an ACL. Tensile force is the amount of pressure level something tin behave before breaking. Therefore, right after surgery, the graft is typically stronger than the original ACL.[1]
  • When the graft is placed inside the body, it is non initially connected to any blood vessels. Claret is what provides nutrients to cells to keep them alive. This causes some of the cells of the graft to die.[3] The graft therefore loses some of its cell density and forcefulness.
find out if your ACL graft is as strong or weaker than your original ACL
Artistic representation of red claret cells flowing through a blood vessel. Find out if your ACL graft is as strong or weaker than your original ACL.

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Proliferation phase (4 - 12 Weeks Later Surgery)

  • The dead cells crusade the body to react, and release a hormone called growth factors.[3] Growth factors then crusade many other reactions in the body, such every bit creating blood vessels that feed the ACL graft and creating new cells to supercede the ones that died.[3] This procedure is and so productive that the body actually creates too many blood vessels and cells.[ii] The new cells likewise take a random organization on the graft.[2]
  • The graft becomes weaker than the original ACL during this stage, and is the weakest 6 - viii weeks after surgery, because of all of these changes going on.[3] This is why playing sports is not prophylactic right after an ACL reconstruction surgery.
Artistic representation of the process of mitosis. During the proliferation phase, new cells are created by the trunk and randomly organized on the new ACL graft.

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Ligamentization phase (>12 Weeks After Surgery)

  • The graft at present begins to remodel itself, which ways irresolute the way it looks, to more closely resemble the original ACL. During remodeling, the excess blood vessels and cells are removed, and the graft starts to arrange it'due south cells in a more than organized way.[3] This remodelling continues to occur years later an ACL reconstruction surgery, and has no definitive endpoint.[3]
  • The graft gets stronger in this phase, because of this remodelling process, and around 1 year subsequently surgery is back about as strong as the original ACL.[3]
  • However, information technology's important to mention that every single study has shown that a new ACL never fully gains the same biological or mechanical backdrop equally the original ACL.[iii] This means that an ACL reconstruction surgery can become your genu to very close to perfectly good for you, just it will nonetheless never exist quite as healthy as it was before the bodily injury.
Artistic interpretation of cells in the body. During the ligamentization phase, the graft starts its remodelling procedure.

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Many factors tin touch someone's actual ability to start using their articulatio genus over again or to return to sports. In terms of what this ways for your recovery from an ACL reconstruction surgery, it takes time for your body to heal and adapt to the new ACL, and so it'southward of import to follow proper precautionary guidelines fix out by your healthcare providers.

Conclusion:

An ACL graft after a reconstruction surgery is initially stronger, but over time becomes weaker, and eventually is about as strong every bit your original ACL. These changes occur equally a event of the body's natural reaction to the new ACL graft. This noesis helps inform people on the precautions they should be taking after an ACL reconstruction surgery.

Curovate can help yous if you have had an ACL reconstruction surgery, to aid get you back to the activities that you love. The app contains daily do plans created by an experienced licensed physiotherapist, along with return to sport exercises and daily video guided exercises. Download our ACL recovery app below.

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Other Blogs Related to ACL Reconstruction:

  • Where is my new ACL coming from?
  • ACL Recovery Timeline
  • When can I render to sport after an ACL injury or surgery?
  • Is an ACL surgery painful?
  • What is an ACL and how is it injured?
  • Can an ACL injury lead to arthritis in the future?
  • Is it normal to still accept pain after an ACL reconstruction surgery?
  • Why is my knee numb and tingly later an ACL reconstruction surgery?

References

1. Cerulli, Grand., Placella, Thou., Sebastiani, Due east., Tei, M. M., Speziali, A., and Manfreda, F. (2013). ACL Reconstruction: Choosing the Graft. Joints, 1(1), 18–24.

2. Claes, S., Verdonk, P., Forsyth, R., & Bellemans, J. (2011). The "ligamentization" procedure in inductive cruciate ligament reconstruction: what happens to the human being graft? A systematic review of the literature. The American journal of sports medicine, 39(11), 2476–2483. https://doi.org/10.1177/0363546511402662

3. Janssen, R. P., & Scheffler, S. U. (2014). Intra-articular remodelling of hamstring tendon grafts after inductive cruciate ligament reconstruction. Articulatio genus surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 22(ix), 2102–2108. https://doi.org/x.1007/s00167-013-2634-5